I found an interesting one. The EnderTank hit box is fixed in place and twisted around. Graphically, it looks correctly placed, but the hit box is not.
The valve hit box always faces south regardless of how it looks. It still works. You just have to click on the south face of the tank to see the valve turn.
The buttons on top are oriented as if the tank is facing north. If you place it facing east or west, the button hit boxes are at right angles. If you place the tank while you are facing north (i.e. the tank faces south) the button hit boxes look correct, but clicking right button with a dye causes the left button to take the color and vise versa.
So not only is the tank hit box bugged, its bugged twice with the buttons wrong in one direction and the value in another.